Expandable stereo speaker



FIG. 1 is a front, side, perspective view of an expandable stereo speaker in an opened condition showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof;

FIG. 7 is an opposite side view thereof;

FIG. 8 is a front, side, perspective view thereof in a closed condition;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a side view thereof; and,

FIG. 12 is an opposite side view thereof.

The broken lines in the drawings illustrate environmental material that forms no part of the claimed design. 

The ornamental design for an expandable stereo speaker, as shown and described. 